How-To: 88-91 speedometer calibration 25085515 91' tach upgrade - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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How-To: 88-91 speedometer calibration 25085515 91' tach upgrade

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12-28-2011, 12:09 AM	#22
tommie 97' Tahoe 2dr/2wd Join Date: Jul 2002 Location: Huffman,TX Posts: 1,168	Re: How-To: 88-91 speedometer calibration 25085515 91' tach upgrade this was a thread i made to swap a tach from a 91 into a 90 truck... so if that's what your doing and its the correct tach (v6 or v8) for your truck... then it should work...all of the info is in this thread....

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